Explanation

Explanation

Because sound is just vibrating air, space has no air to vibrate and therefore no sound in a vacuum.

Sound waves below 20 Hz are known as infrasound.

Sound waves above 20 kHz are known as ultrasound

Sound waves transmit a medium such as a gas, liquid, or solid.

• The speed of sound in air is about 343 meters per second
• The sound travels at 1,481 m/s in water 
• The speed of sound in a vacuum is zero meters per second.

Explanation

Lahore resolution was passed on 23 March 1940

The resolution was presented at Minto Park, in Lahore

It is Presented by A.K Fazul Haq   

It was passed in the 27th annual session of the All India Muslim League.

It was written and prepared by Muhammad Zafarullah Khan.

This resolution is also called the Pakistan resolution

Additional information:

Participate From Punjab (Leader): Zafar Ali Khan

Participate From Sindh (Leader): Sir Abdullah Haroon

Participate From Balochistan (Leader): Qazi Faiz Isa

Participate From KPK (Leader): Sardar Aurangzaib Khan

CM Banglad : A.K Fazul Haq 

United Province: Khalid Zaman

Explanation

Confused Question

Ø  Amazon river in South America is the largest river in the world.

Ø  while Nile river in Africa is the longest river in the world.

World Major Rivers

Explanation

"In the Line of Fire" is a book written by former President of Pakistan Pervez Musharraf.

It was first published on September 25, 2006.

Explanation

Mareena is afraid of spiders

نفیسہ مکڑیوں سے ڈرتی ہے۔

Generally, the word afraid takes the preposition of.

Afraid of means خوفزدہ 

ND12_8_2023

Explanation

•  According to Article 49(1) of the Constitution of Pakistan, the Chairman Senate acts as President in the President’s absence.
• Speaker National Assembly as acting Prime Minister of Pakistan in the absence of PM.
• The term for members of the Senate is 6 years.
• The minimum age for senators is 30 years.

Explanation

Graphite is a crystalline form of the element carbon.

It consists of stacked layers of graphene.

Graphite occurs naturally and is the most stable form of carbon under standard conditions.

Explanation

A sphygmomanometer also known as a blood pressure monitor.

It is a device used to measure blood pressure.

A normal blood pressure level of 120/80 mmHg.

High-normal: 130 to 139 mmHg

High: Greater than 140 mmHg

while

mmHg stands for "Millimeter of Mercury"

Explanation

CNG stands for Compressed Natural Gas

Methane is the main component of CNG 

the modern use of CNG as a fuel source began in the 1930s,

American physicist Dr. J.P. Farley discovered that natural gas could be compressed to a high-pressure 

natural gas became a transport fuel during the First World War